#define PDC_MISC_IOCSET_LED _IOWR(PDC_MISC_BASE_CMD, 0u, Ptr);

Int32  PDI_miscIoctl(Uint32 cmd, Ptr pCmdArgs)
{
        MISC_Obj        *pMiscObj;
        
        int miscFd = open("/dev/pdcMisc", O_RDWR);
        ioctl(miscFd, PDC_MISC_IOCSET_LED, pCmdArgs);
}

static struct file_operations gFops = {
        .owner        = THIS_MODULE,
        .ioctl            = MISC_ioctl;
        .open            = MISC_open;
};
// 主次设备号都为 0， 则自动分配设备号
alloc_chrdev_region(&devNo, 0, 1, cDevName);
register_chrdev_region(devNo, 1, cDevName);
cdev_init(&pCdevObj->cdev, &gFops);
cdev_add(&pCdevObj->cdev, pCdevObj->devNo, 1);
struct class pClass = class_create(THIS_MODULE, pCdevObj->name);
struct class_device pClassDevice = device_create (pClass, NULL, devNo, NULL, cDevName);

static Int32 MISC_ioctl(OSA_KCdevHandle hCdev, Uint32 cmd, Uint32L arg)
{
    switch (cmd)
    {
        case PDC_MISC_IOCSET_LED:
                PDC_ledSetParams ledParams;
                status = copy_from_user(&ledParams, (Ptr)arg, sizeof(ledParams));
                break;
    }
}